Mason jar lid



FIG. 1 is a top perspective view of a mason jar lid showing our new design in a closed position;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a top plan view thereof; and

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a top perspective view thereof showing our new design in an open position; and,

FIG. 10 is a bottom perspective view thereof.

The dashed broken lines in the drawings illustrate portions of the mason jar lid that form no part of the claimed design.

The dot-dash broken lines in the drawings define the boundaries of the claimed design and form no part thereof. 

CLAIM The ornamental design for a mason jar lid, as shown and described. 